Population 8,091 · Census ACS 2020–24
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Population and households in Port Jefferson
Household size in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.48 | 2.79 | 2.68 | 2.68 |
| 2010–14 | 2.45 | 2.85 | 2.72 | 2.73 |
| 2015–19 | 2.57 | 2.82 | 2.69 | 2.71 |
| 2020–24 | 2.44 | 2.79 | 2.65 | 2.65 |
| Change | −0.05 | −0.00 | −0.03 | −0.03 |
The average household in Port Jefferson has 2.44 people, under the U.S. average of 2.65. Household size has edged down from 2.48 in 2006–10, as it has nationally.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 39.7 | 38.0 | 38.3 | 37.7 |
| 2010–14 | 44.2 | 38.7 | 39.0 | 38.6 |
| 2015–19 | 44.0 | 39.8 | 40.2 | 39.6 |
| 2020–24 | 44.7 | 40.4 | 40.8 | 40.1 |
| Change | +5.0 | +2.4 | +2.5 | +2.3 |
With a median age of 44.7, Port Jefferson is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees. The median age has climbed from 39.7 in 2006–10, mirroring the country.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 9.0% | 13.1% | 13.1% | 12.3% |
| 2010–14 | 3.3% | 12.8% | 12.7% | 12.3% |
| 2015–19 | 4.8% | 11.4% | 11.6% | 11.6% |
| 2020–24 | 6.7% | 11.6% | 11.6% | 11.6% |
| Change | −2.3 pts | −1.5 pts | −1.5 pts | −0.6 pts |
Single parents head only 6.7% of households in Port Jefferson, well below the national share of 11.6%. The single-parent share has fallen 2.3 points since 2006–10, a much bigger shift than nationally.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Port Jefferson
Renters in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 30.0% | 47.1% | 44.8% | 33.3% |
| 2010–14 | 26.9% | 48.7% | 46.2% | 35.6% |
| 2015–19 | 31.7% | 48.8% | 46.2% | 36.0% |
| 2020–24 | 28.0% | 48.6% | 45.7% | 34.8% |
| Change | −2.1 pts | +1.5 pts | +0.9 pts | +1.5 pts |
Most households in Port Jefferson own their homes; 28.0% rent, below the national share of 34.8%. Among homeowners, 43.4% have no mortgage at all, above the national share of 39.8%. Renting is most common in the south and least common in the northeast. Since 2006–10, the renter share has fallen 2.1 points, even as the national share rose.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.4% | 9.1% | 10.3% | 11.4% |
| 2010–14 | 7.3% | 9.0% | 10.4% | 11.4% |
| 2015–19 | 6.4% | 9.1% | 11.0% | 11.1% |
| 2020–24 | 10.9% | 7.9% | 9.7% | 9.6% |
| Change | +2.5 pts | −1.2 pts | −0.6 pts | −1.8 pts |
Vacancy in Port Jefferson is close to the national rate: 10.9% of homes are empty, against 9.6%. The rate is higher than in the New York area overall (7.9%). Since 2006–10, vacancy has risen 2.5 points, even as the national rate fell.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 1963 | 1957 | 1956 | 1974 |
| 2010–14 | 1966 | 1958 | 1957 | 1975 |
| 2015–19 | 1964 | 1959 | 1958 | 1977 |
| 2020–24 | 1969 | 1962 | 1961 | 1980 |
| Change | +6 | +5 | +5 | +6 |
The housing in Port Jefferson is old by national standards: the median home dates to 1969, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. Locally, though, homes here are newer than in the New York area as a whole, where the median home dates to 1962. The median year built has moved up from 1963 in 2006–10, a sign of steady new building. Newer construction is concentrated in the southeast, while the center has the oldest housing.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,472 | $1,268 | $1,095 | $965 |
| 2010–14 | $1,406 | $1,377 | $1,201 | $1,040 |
| 2015–19 | $1,952 | $1,645 | $1,426 | $1,213 |
| 2020–24 | $2,435 | $2,060 | $1,794 | $1,571 |
| Change | +$963 | +$792 | +$698 | +$606 |
The median renter in Port Jefferson pays $2,435 a month for rent and utilities, well above the national median of $1,571. Rents are up $963 a month from 2006–10, a 65% jump, roughly in step with the nation. The typical renter here spends 31.9% of household income on rent, just over the 30% mark often used to define affordable rent. The priciest rents are in the west; the most affordable are in the southeast.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Port Jefferson
Bachelor's degrees in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 60.1% | 35.0% | 31.9% | 28.4% |
| 2010–14 | 61.7% | 36.7% | 33.4% | 29.6% |
| 2015–19 | 58.1% | 39.9% | 36.2% | 32.1% |
| 2020–24 | 67.6% | 43.6% | 39.8% | 35.6% |
| Change | +7.5 pts | +8.6 pts | +8.0 pts | +7.2 pts |
Port Jefferson is highly educated: about two-thirds of adults 25 and older (67.6%) hold at least a bachelor's degree, far above the national share of 35.6%. The share with a degree has risen 7.5 points since 2006–10, mirroring the country. Only 35 of the 488 New York cities with 5,000+ people have a higher share of college graduates.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 97.3% | 83.7% | 84.0% | 84.9% |
| 2010–14 | 98.0% | 84.6% | 84.9% | 86.1% |
| 2015–19 | 96.1% | 86.2% | 86.5% | 87.7% |
| 2020–24 | 97.3% | 86.9% | 87.3% | 89.3% |
| Change | +0.0 pts | +3.3 pts | +3.3 pts | +4.3 pts |
Finishing high school is nearly universal in Port Jefferson: 97.3% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Only 38 of the 488 New York cities with 5,000+ people have a higher share of high school graduates.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Port Jefferson
| Period | Port Jefferson | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.2% | 7.9% | 7.7% | 8.1% |
| 2010–14 | 6.7% | 9.5% | 9.2% | 9.4% |
| 2015–19 | 2.1% | 5.7% | 5.7% | 5.6% |
| 2020–24 | 3.0% | 6.9% | 6.6% | 5.4% |
| Change | −1.2 pts | −0.9 pts | −1.2 pts | −2.7 pts |
The job market in Port Jefferson has been strong: just 3.0% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment is down 1.2 points from 2006–10, mirroring the country. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Port Jefferson compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Port Jefferson | 2.44 | 44.7 | 6.7% | 28.0% | 10.9% | 1969 | $2,435 | 67.6% | 97.3% | 3.0% |
| Belle Terre | 2.96 | 47.5 | 8.4% | 2.4% | 9.1% | 1964 | $1,984 | 67.2% | 99.6% | 6.6% |
| Poquott | 2.84 | 42.8 | 9.0% | 12.1% | 7.8% | 1959 | $2,917 | 69.5% | 97.9% | 3.1% |
| Port Jefferson Station | 2.79 | 42.5 | 6.4% | 21.2% | 8.4% | 1976 | $2,400 | 40.3% | 92.0% | 3.8% |
| Setauket-East Setauket | 2.81 | 44.8 | 6.7% | 14.3% | 7.6% | 1969 | $2,566 | 64.3% | 97.6% | 5.0% |
| Mount Sinai | 2.84 | 48.7 | 2.3% | 7.6% | 6.5% | 1987 | $2,656 | 51.4% | 95.2% | 2.3% |
| East Setauket | 2.78 | 48.2 | 11.3% | 13.4% | 12.4% | 1964 | $2,852 | 58.4% | 97.1% | 7.4% |
| Terryville | 2.87 | 39.2 | 5.4% | 25.2% | 10.9% | 1971 | $2,977 | 29.9% | 89.3% | 6.1% |
| Miller Place | 3.10 | 44.5 | 3.0% | 17.1% | 8.3% | 1983 | $1,229 | 46.8% | 94.8% | 5.2% |
| Stony Brook University | 2.82 | 28.9 | 2.3% | 9.5% | 8.5% | 1965 | $3,501 | 40.0% | 90.3% | 0.0% |
| Old Field | 2.76 | 45.9 | 8.8% | 19.3% | 15.1% | 1970 | $3,501 | 81.1% | 96.5% | 4.8% |
All figures 2020–24.
Cities with similar populations: Colusa, CA · Cottontown, TN · Cos Cob, CT · Corry, PA · Coplay, PA · Coopersville, MI · Conning Towers Nautilus Park, CT · Conifer, CO · Congers, NY · Winslow, ME
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Port Jefferson. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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